Well, you're simply amazing, Tony, to be able to catch out someone who's a renowned teacher.
But let me explain something: Among those who were there and among those who write about the war on the basis of first-hand knowledge, the Mekong Delta often is referred to as the Vietnam Delta. I guess because it's the main delta in Asia, and because we did a lot of fighting there. I could tell that you didn't know that. So now you can catch out your teacher of geography on that one.